Family XI. Pceciliid^;. 131 



Gambusia nobilis Girard, Mex. Bd. Sur., 71, pi. xxxix, figs. 

 8-11, 1859; Comanche Spring: Woolman, Bull. U. S. Fish 

 Comm., 1894, 60; Rio Chihuahua, Chihuahua. 

 Gambusia speciosa Girard, Proc. Acad. Nat. Sci. Phila., 1859, 121; 

 Rio San Diego, a tributary of Rio San Juan near Cadereita, 

 Nuevo Leon. 

 Gambusia gracilis Girard, Proc. Acad. Nat. Sci. Phila., 1859, 121; 



Matamoras. 

 Gambusia senilis Girard, Proc. Acad. Nat. Sci. Phila., 1859, 122; 



Rio Chihuahua, Chihuahua. 

 Gambusia patruelis Garman, Bull. Mus. Comp. Zool., 1881, 93; 

 Monclova, Mexico: Garman, Memoirs, Mus. Comp. Zool., 1895, 

 84; Mexico. 

 Gambusia affinis Jordan & Evermann, Bull. 47, U. S. Nat. Mus., 

 1896, 680: Jordan & Snyder, Bull. U. S. Fish Comm., 

 1900, 127; lagoons near Tampico: Meek, Field Col. Mus. Pub. 

 65, 1902, 98; Jimenez; Santa Rosalia; Chihuahua; San Andres. 

 Lowland streams of the south Atlantic states and Gulf coasts to 

 the Rio Panuco and to the Rio Conchos in Chihuahua. (Sauz; Mon- 

 terey; Garza Valdez; La Cruz; Santa Engracia; Forlon; Valles.) 



Head 3^ to 4; depth 3^ to 4; D. 7 or 8; A. 8; scales 9-32. Body 

 rather robust, not much compressed; head rather large, flat above, 

 interorbital 2 in head; snout 3 in head; lower jaw the longer; teeth in 

 jaws in bands, the outer series enlarged; diameter of eye 3 in head; 

 origin of dorsal fin over middle of last ray of anal, its distance from 

 base of caudal 1 yi in its distance to tip of snout ; pectoral 1 % in head ; 

 ventrals 2% in head; caudal fin truncate; least depth of caudal 

 peduncle i^ in head; alimentary canal about as long as the body; 

 peritoneum dusky. 



Color light olive, edges of scales dark; a faint dark lateral streak or 

 dusky band on sides ; sides and belly dusted with black dots ; a narrow 

 band downward and backward from eye; occasionally some dark on 

 anal fin; other fins plain. Length about 2 inches. 



One female 1.6 inches in length, collected the last week in May, 

 contained 22 eggs, eye spots not formed. 



121. Gambusia infans Woolman. 



Gambusia in] an s Woolman, Bull. U. S. Fish Comm., 1894, 62, pi. 2, 

 fig. 3; Rio Lerma, Salamanca, Guanajuato: Jordan & Ever- 

 mann, Bull. 47, U. S. Nat. Mus., i8q6, 680: Meek, Field Col. 

 Mus. Pub. 65, 1902, 99; Celaya; Ocotlan; La Barca; Huingo. 



Gambusia affinis Pellegrin, Bull. Mus. Hist. Nat. Paris, 1901, 205; 

 Lago de Zacoalco, Estado de Jalisco. 



